River is one of our most popular discs of the past decade, probably due to it’s tremendous GLIDE. The River is a fairway driver for those accuracy shots that demands good control. It is easy to throw and fits most player’s power and skill levels. With small fade and amazing glide, you can really let it fly on those big anhyzer curves.

Opto Air Line Plastic 
Opto Air uses the same material as our durable Opto Line plastic. It is however slightly modified with a different process to achieve a stunning result of lighter weight discs, but keeping the same weight distribution as close as possible to the Opto and Gold Line discs. Opto Line is made out of some of the world’s most durable plastics. It comes in a variety of beautiful translucent colors. The Opto Line plastic has been developed to withstand severe punishment and extreme conditions better than other plastics.



Specifications
Approved Date: Jun 2, 2010
Max Weight: 178.5gr
Diameter: 21.5cm
Height: 1.9cm
Rim Depth: 1.2cm
Rim Thickness: 1.8cm
Inside Rim Diameter: 17.8cm
Rim Depth / Diameter Ratio: 5.6%
Rim Configuration: 30.50
Flexibility: 9.07kg